|Número de publicación||US4243031 A|
|Tipo de publicación||Concesión|
|Número de solicitud||US 05/970,286|
|Fecha de publicación||6 Ene 1981|
|Fecha de presentación||18 Dic 1978|
|Fecha de prioridad||18 Dic 1978|
|También publicado como||CA1127040A, CA1127040A1, DE2950799A1|
|Número de publicación||05970286, 970286, US 4243031 A, US 4243031A, US-A-4243031, US4243031 A, US4243031A|
|Inventores||Joseph N. Genese|
|Cesionario original||Abbott Laboratories|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (28), Citada por (67), Clasificaciones (8)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
This invention relates to a shut-off device for an intravenous administration set. More particularly, this invention relates to a shut-off device in an intravenous administration set which utilizes a pumping mechanism as the motivating force for the fluid as well as a final filter unit, the shut-off device being set at a predetermined force so as to stop fluid flow should the fluid pressure exceed the predetermined point so that the filter will not be physically impaired.
Flow regulating devices of the type concerned with in this invention are described in U.S. Pat. Nos. 3,963,024; 3,989,043, 4,030,495 and 4,043,332. In U.S. Pat. Nos. 2,579,334; 2,897,833; 3,321,173 and 3,357,448 biasing-type diaphragm mechanisms are disclosed for regulating fluid flow. While U.S. Pat. Nos. 3,963,024; 3,989,043; 4,030,495 and 4,043,332 describe flow regulating units for intravenous administration sets, none of them is concerned with an I.V. set having a pumping mechanism with a filter. The same is true regarding the remaining previously referred to patents which are not directed to the I.V. administration field.
It is an advantage of the present invention to provide a pressure-actuated protective device for a filter in an I.V. administration set. Other advantages are a pressure-actuated shut-off device for an I.V. administration system which is sensitive to low pressures such as those provided by an I.V. pump; a fluid flow shut-off device which has a minimum number of parts; is easy to assemble; can be sterilized without difficulty and can be manufactured at a low cost.
The foregoing advantages are accomplished and the shortcomings of the prior art are overcome by the present pressure-activated shut-off device for an intravenous fluid administration set which includes a housing defining a piston chamber with a large and a small cavity. A piston member has a piston head and a piston arm with the piston head placed in slidable engagement in the large cavity and the piston arm in the small one. Biasing means urge the piston member in the direction away from the small dimensional cavity. In addition, fluid passage means communicate with the large and small dimensional cavity and includes an outlet passage. A valve seat is provided in the small dimensional cavity and the outlet passage. A valve closure is defined by means of the piston arm for sealable contact with the valve seat and means are provided to vent the large dimensional cavity between the piston head and the small dimensional cavity. Intravenous tubing is connected to the large cavity and the outlet passage so that upon the pressure in the large cavity reaching a predetermined point it will act upon the piston head to move the piston head against the biasing means and thereby force the valve closure against the valve seat to stop fluid flow. In one embodiment, a channel is positioned longitudinally in the piston member to provide a fluid flow from the large cavity to the small cavity. In another embodiment, fluid communication between the two cavities is afforded by a branch fluid line with a main fluid line communicating with said small dimensional cavity and a branch line communicating with said large dimensional cavity.
A better understanding of the pressure-activated shut-off device of this invention will be accomplished by reference to the drawings wherein:
FIG. 1 is a view in side elevation with portions of the container and drip chamber broken away.
FIG. 2 is a view in vertical section illustrating one embodiment of the pressure-activated shut-off device in an open position.
FIG. 3 is a view similar to FIG. 2 except showing the shut-off device in a closed position.
FIG. 4 is a view of another embodiment of the shut-off device shown in vertical section and in an open position.
FIG. 5 is a view similar to FIG. 4 except showing the shut-off device of FIG. 4 in a closed position.
Proceeding to a detailed description of one embodiment of the present invention, the shut-off device generally 10 is illustrated in conjunction with an I.V. administration set generally 11 which includes the usual drip chamber 14 having a vented piercing pin 15 for fluid communication with I.V. solution container 12. A length of tubing 17 interconnects drip chamber 14 and a Y-reseal unit 20 with a roller clamp 16 engaging tubing 17 for liquid control or shut-off purposes. A pump chamber 22 having a plunger 24 is interconnected to the solution container 12 and is activated by means of an I.V. pump actuator 21. The pump chamber 22 and pump actuator 21 are of the type generally described in U.S. Pat. Nos. 3,559,644 and 3,620,650. A length of tubing 18 interconnects the shut-off device 10 with the pump chamber 22 and filter 23 of the disc-type, filters the liquid prior to its being administered by means of hypodermic needle 25 secured to needle adapter 26.
Referring specifically to FIGS. 2 and 3, it will be seen that shut-off device 10 includes a tubular housing 28 enclosed by an end portion 30 to provide a piston chamber 29 with a large cavity 31 and a small cavity 32 provided by annular section 33. A piston member 34 having a piston head 36 and a piston arm 37 is slidably received in housing 28 with piston head 36 slidably disposed in the large cavity 31 and piston arm 37 similarly disposed in small cavity 32. Sealing rings 38 and 39 provide the necessary sealable engagement for piston arm 37 and piston head 36. A spring 40 affords a biasing means with one end seated against end portion 30 and the other against head 36 to bias the head away from end portion 30. A fluid channel 42 extends longitudinally through piston member 34 from large cavity 31 to small cavity 32 and has a lateral extension 41 in communication with small cavity 32. Disposed in end portion 30 is a valve seat 43 for contact by valve closure 44 which is provided by means of and end portion of piston arm 37. It is of a conical shape and of the spool type. This contact is best seen in FIG. 3 which shows the shut-off device in a closed position. An outlet passage 35 communicates with small cavity 32 with valve seat 43 positioned at the junction thereof with outlet passage 35 having a smaller dimension than cavity 32. It will be noted that tubing 18, channel 42 and fluid outlet passage 35 are all in alignment and that channel 42 terminates adjacent conically shaped portion 44. An aperture 46 in housing 28 affords a vent means between the outside atmosphere and large cavity 31.
Referring to FIGS. 4 and 5, another embodiment of the invention is illustrated by the numeral 110. Parts similar to unit 10 are designated by similar numbers except that they are referred to in the "100" series. The major difference between embodiment 110 and 10 is that in embodiment 110 a fluid passage is not provided in piston member 134. In its place, a lateral extension 145 in the form of a passage in housing 128 is afforded and interconnected adjacent valve closure 144 and with lateral tubing 148 or the main fluid line. This extension 145 and lateral tubing 148 when interconnected with branch line tubing 127 provides fluid communication between large cavity 131 and small cavity 132. Other differences between the two embodiments is that in embodiment 110, the end portion 130 is secured to housing 128 by means of cap screws 147; end portion 130 is disposed adjacent the piston head 136 rather than the piston arm 137 as in unit 10 and annular section 133 forming a portion of small cavity 132 extends from housing 128.
A better understanding of the advantages of shut-off device 10 will be had by a description of its operation. As shown in FIG. 1, shut-off device 10 will be interconnected to pump chamber 22 by means of a fluid conduit in the form of tubing 18 at one end and to filter 23 at the other end through tubing 19. Parenteral solution will be allowed to flow from container 12 into drip chamber 14 by means of the vented piercing pin 15. Roller clamp 16 will provide the desired flow rate to pump chamber 22. Hypodermic needle 25 will be inserted into an appropriate vein and pump actuator 21 will be activated to drive the pump plunger 24 of pump chamber 22 so as to cause fluid under pressure to flow into tubing 18, through fluid passage 42, out through lateral passage 41, into small cavity 32, into outlet passage 35 and ultimately into tubing 19. It will be recognized that biasing means 40 will exert a predetermined force on piston head 36 so as to cause valve closure 44 to be positioned away from valve seat 43, as shown in FIG. 2. It will be further recognized that filter 23 will have a filter element which will withstand only a certain amount of force. The spring 40 will exert a force that is less than the amount of fluid force which can be tolerated by filter 23. Should the filter become clogged or inoperative for any purpose, a pressure buildup will then be effected in tubing 18 and 19 as the pump actuator continues to operate. The pressure will build and act upon piston head 36 until the force of the spring 40 is overcome. When the force of the spring is overcome, the piston 34 will move in the direction of valve seat 43 causing piston arm 37 and valve closure 44 to seat against valve seat 43. In this position, and as shown in FIG. 3, liquid will not flow into outlet passage 35 from passage 42 and fluid flow to the filter will stop. At this stage, a new I.V. administration set 11 will be utilized in place of the prior one with the malfunctioning filter.
During the previously described closing of valve closure 44, it will be seen that the reason for the piston member 34 moving under the influence of a predetermined pressure is that the piston head 36 presents a larger surface area exposed to the pressurized liquid than does the piston arm 37. It will be further recognized that large cavity 31 and small cavity 32 are pressurized to the same degree by means of fluid passage 42.
Embodiment 110 will operate substantially in the same way as does embodiment 10 except for the fluid communication between the large cavity 131 and the small cavity 132. In embodiment 110, the fluid communication is not by means of a central channel but instead through lateral passage 145, lateral branch 148 and tubing 118. Accordingly, the pressure of fluid acting on piston head 136 will be sufficient to move valve closure 144 against valve seat 143 at a predetermined point when the force of the spring 140 is overcome. This will effect a stoppage of flow between tubing 118 and 119, as best seen in FIG. 5.
The assembly of unit 10 is quite simple in that all that is required is placement of spring 40 against piston head 36 with piston head 36 seated in housing 28 and the opposing end of the spring seated against end portion 30, and the piston arm 37 positioned in small cavity 32. With the previously described parts so positioned, end portion 30 will be sealed in housing 28 by means of ultrasonic welding or solvent bonding and the force of spring 40 will press piston head 36 against the opposite end of housing 28. The assembly of unit 110 is similar to that of 10 except that the end portion 130 will be affixed to housing 128 by means of cap screws 147.
In describing units 10 and 110, it should be recognized that while one particular pump chamber 22 and pump actuator 21 has been described for use in conjunction with the shut-off devices 10 and 110 any type of I.V. pumping unit could be utilized. Further, while a cylindrical-type filter 23 is described for use with the shut-off devices 10 and 110, any filter unit operable in an I.V. administration set could be employed in conjunction with the shut-off devices and have them operate in the same efficient manner.
The housings 28 as well as 128 and the end portions 30 and 130 are formed from a polycarbonate plastic material while the piston members 34 and 134 are formed from acrylonitrile or butadiene-styrene plastic materials. Other materials such as polyesters could be used for the housing and the end portions and nylon could be used to manufacture the piston members. It will be recognized that due to the types of materials employed in fabricating units 10 and 110, they are low in cost and accordingly are disposable so as to not add appreciable cost to an otherwise disposable I.V. administration set.
It will thus be seen that through the present invention there is now provided a shut-off device for an I.V. pump which will effect a stopping of I.V. fluid should a filter become inoperative or clogged. The shut-off devices afford a safety factor in I.V. administration in that they will substantially reduce the risk of a filter being ruptured and filter material being injected into the patient. The shut-off units are composed of few parts, are easily assembled and are disposable thus adding little cost to the I.V. administration set.
The foregoing invention can now be practiced by those skilled in the art. Such skilled persons will know that the invention is not necessarily restricted to the particular embodiments presented herein. The scope of the invention is to be defined by the terms of the following claims as given meaning by the preceding description.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US469611 *||30 Dic 1890||23 Feb 1892||tully|
|US572211 *||9 Abr 1896||1 Dic 1896||Cylinder-cock|
|US635127 *||29 Sep 1898||17 Oct 1899||Pneumatic Power Company||Controlling mechanism for fluids or gases under pressure.|
|US742290 *||14 Jul 1902||27 Oct 1903||James H Clark||Automatic pressure-actuated governor for steam engines or pumps.|
|US824425 *||24 Jul 1902||26 Jun 1906||Charles H Johnson||Governor for fluid-pressure motors.|
|US1900514 *||25 Mar 1932||7 Mar 1933||Schnackel S Son Inc C||Automatic valve|
|US2093015 *||11 Oct 1935||14 Sep 1937||Madden Joseph D||Hydraulic brake|
|US2103349 *||29 Feb 1936||28 Dic 1937||Westinghouse Air Brake Co||Check valve device|
|US2121936 *||1 May 1934||28 Jun 1938||Phillips Petroleum Co||Combination excess flow and check valve|
|US2138719 *||13 May 1937||29 Nov 1938||Charles Bryan Wright||Blow-out preventer|
|US2351035 *||29 Ago 1942||13 Jun 1944||Specialties Dev Corp||Cutoff valve|
|US2447546 *||30 Mar 1942||24 Ago 1948||Lane Wells Co||Automatic shutoff apparatus for oil wells|
|US2579334 *||30 Jul 1949||18 Dic 1951||Shell Dev||Adjustable-rate differential pressure responsive device|
|US2583384 *||29 Sep 1944||22 Ene 1952||Jean Mercier||Flow regulator|
|US2710626 *||9 Nov 1949||14 Jun 1955||Burdick Bros Inc||Safety valve for fluid control systems|
|US2771878 *||27 Ago 1952||27 Nov 1956||American Optical Corp||Intravenous infusion system|
|US2897833 *||14 Feb 1956||4 Ago 1959||Henry W Seeler||Respiratory apparatus|
|US3321173 *||27 Feb 1964||23 May 1967||United Aircraft Corp||Low flow valve|
|US3357448 *||14 Jun 1965||12 Dic 1967||Micro Pump Corp||Constant flow valve|
|US3377109 *||17 May 1966||9 Abr 1968||Alfred E Porter||Control valve|
|US3472275 *||28 Jul 1967||14 Oct 1969||Baker Oil Tools Inc||Flow regulator apparatus|
|US3476141 *||13 Ene 1967||4 Nov 1969||Marotta Valve Corp||Fluid flow fuse|
|US3963024 *||8 Abr 1975||15 Jun 1976||Michael Goldowsky||Fluid flow regulator|
|US3985133 *||28 May 1974||12 Oct 1976||Imed Corporation||IV pump|
|US3985336 *||16 Jul 1975||12 Oct 1976||Clarence Bentley||Drip irrigation valve|
|US3989043 *||23 Dic 1974||2 Nov 1976||John Dimeff||Automatic flow control and automatic shut off for intravenous feeders|
|US4030495 *||7 Nov 1975||21 Jun 1977||Baxter Travenol Laboratories, Inc.||Twin check valve pump system having fail-safe characteristic|
|US4043332 *||14 May 1975||23 Ago 1977||Nathan Blumberg||Constant flow rate liquid medicament administering device|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US4347874 *||2 Oct 1980||7 Sep 1982||Sullivan James J||High speed sterile fluid transfer unit|
|US4355639 *||8 Jul 1980||26 Oct 1982||Sis-Ter S.P.A.||Apparatus for the parenteral administration of liquids at a constant, adjustable flow rate|
|US4373525 *||6 Feb 1981||15 Feb 1983||Terumo Corporation||Method and apparatus for detecting occlusion in fluid-infusion tube of peristaltic type fluid-infusion pump|
|US6866654 *||6 Sep 2002||15 Mar 2005||Medrad, Inc.||Pressure isolation mechanisms and fluid delivery systems including pressure isolation mechanisms|
|US7094216 *||18 Oct 2001||22 Ago 2006||Medrad, Inc.||Injection system having a pressure isolation mechanism and/or a handheld controller|
|US7326186||6 Abr 2004||5 Feb 2008||Medrad, Inc.||Injector system and fluid control device providing sharp bolus injection|
|US7361156||20 Dic 2002||22 Abr 2008||Medrad, Inc.||Pressure jacket system with pivotal locking members|
|US7389788||9 Dic 2002||24 Jun 2008||Acist Medical Systems, Inc.||Low pressure measurement devices in high pressure environments|
|US7549977||20 Dic 2002||23 Jun 2009||Medrad, Inc.||Front load pressure jacket system with syringe holder and light illumination|
|US7556619||16 Abr 2004||7 Jul 2009||Medrad, Inc.||Fluid delivery system having a fluid level sensor and a fluid control device for isolating a patient from a pump device|
|US7563249||5 Abr 2004||21 Jul 2009||Medrad, Inc.||Syringe having an alignment flange, an extending lip and a radial expansion section of reduced wall thickness|
|US7611503 *||16 Abr 2004||3 Nov 2009||Medrad, Inc.||Fluid delivery system, fluid path set, sterile connector and improved drip chamber and pressure isolation mechanism|
|US7617837||11 Abr 2006||17 Nov 2009||Acist Medical Systems, Inc.||Low pressure measurement devices in high pressure environments|
|US7905246||7 Oct 2009||15 Mar 2011||Acist Medical Systems, Inc.||Low pressure measurement devices in high pressure environments|
|US8147464||2 Jun 2009||3 Abr 2012||Medrad, Inc.||Drip chamber and fluid level sensing mechanism for a fluid delivery system|
|US8172796||23 Mar 2009||8 May 2012||Medrad, Inc.||Syringe with alignment flange and expansion section with reduced wall thickness|
|US8187225||18 Mar 2009||29 May 2012||Medrad, Inc.||Fluid injection system and pressure jacket assembly with syringe illumination|
|US8251092||21 Sep 2009||28 Ago 2012||Medrad, Inc.||Flow based pressure isolation mechanism for a fluid delivery system|
|US8337456||7 May 2009||25 Dic 2012||Medrad, Inc.||Syringe having a proximal end with an outward extending lip|
|US8388580||8 May 2009||5 Mar 2013||Medrad, Inc.||Fluid injection apparatus having a syringe presence sensor|
|US8414540||8 May 2009||9 Abr 2013||Ralph H. Schriver||Fluid injection apparatus having anti-rotation elements to limit syringe plunger rotation|
|US8540698||3 Dic 2004||24 Sep 2013||Medrad, Inc.||Fluid delivery system including a fluid path set and a check valve connector|
|US8590555||26 Ene 2011||26 Nov 2013||Acist Medical Systems, Inc.||Low pressure measurement devices in high pressure environments|
|US8652110 *||26 Jul 2010||18 Feb 2014||Sugan Co., Ltd.||Valve-equipped hand switch and chemical liquid introduction system|
|US8747358||29 Sep 2005||10 Jun 2014||Bayer Medical Care Inc.||Injector system with a manual control device|
|US8808253||2 Abr 2012||19 Ago 2014||Bayer Medical Care Inc.||Drip chamber and fluid level sensing mechanism for a fluid delivery system|
|US8852147||20 Dic 2004||7 Oct 2014||Bayer Medical Care Inc.||Fluid delivery system including a valve and a pressure transducer|
|US8919384||27 Ago 2012||30 Dic 2014||Bayer Medical Care Inc.||Flow based pressure isolation mechanism for a fluid delivery system|
|US8992489||22 Dic 2010||31 Mar 2015||Bayer Medical Care Inc.||Fluid delivery system, fluid path set, and pressure isolation mechanism with hemodynamic pressure dampening correction|
|US9011377||5 Nov 2008||21 Abr 2015||Bayer Medical Care Inc.||Fluid mixing control device for a multi-fluid delivery system|
|US9433730||14 Mar 2013||6 Sep 2016||Bayer Healthcare Llc||Fluid mixing control device for a multi-fluid delivery system|
|US9526829||22 Dic 2014||27 Dic 2016||Bayer Healthcare Llc||Flow based pressure isolation and fluid delivery system including flow based pressure isolation and flow initiating mechanism|
|US9669206||12 Ago 2014||6 Jun 2017||Bayer Healthcare Llc||Connector and fluid path set for a fluid delivery system|
|US9764081||8 May 2014||19 Sep 2017||Bayer Healthcare Llc||Fluid path containing a pressure isolation valve|
|US20030122095 *||9 Dic 2002||3 Jul 2003||Wilson Robert F.||Low pressure measurement devices in high pressure environments|
|US20040122369 *||20 Dic 2002||24 Jun 2004||Schriver Ralph H.||Front load pressure jacket system with syringe holder and light illumination|
|US20040122370 *||20 Dic 2002||24 Jun 2004||Joyce Thomas P.||Front load pressure jacket system with pivotal locking members|
|US20040143212 *||18 Oct 2001||22 Jul 2004||Trombley Frederick W.||Powered injector systems and injector control|
|US20040143225 *||6 Sep 2002||22 Jul 2004||Callan Gerald W.||Pressure isolation mechanisms, method of use thereof and fluid delivery systems including pressure isolation mechanisms|
|US20040242996 *||6 Abr 2004||2 Dic 2004||Trombley Frederick W.||Injector system and fluid control device providing air purging and sharp bolus injection|
|US20040254533 *||5 Abr 2004||16 Dic 2004||Schriver Ralph H.||Fluid injection apparatus with front load pressure jacket, light illumination, and syringe sensing|
|US20050104444 *||20 Dic 2004||19 May 2005||Callan Gerald W.||Pressure isolation mechanisms, method of use thereof and fluid delivery systems including pressure isolation mechanisms|
|US20050230575 *||30 Sep 2004||20 Oct 2005||Zelenski Karen M||Mobile fluid delivery system with detachable pedestal|
|US20050234407 *||16 Abr 2004||20 Oct 2005||Spohn Michael A||Fluid delivery system, fluid control device, and methods associated with the fluid delivery system and fluid control device|
|US20050234428 *||16 Abr 2004||20 Oct 2005||Spohn Michael A||Fluid delivery system, fluid path set, sterile connector and improved drip chamber and pressure isolation mechanism|
|US20060180202 *||11 Abr 2006||17 Ago 2006||Acist Medical Systems, Inc.||Low pressure measurement devices in high pressure environments|
|US20080086087 *||3 Dic 2004||10 Abr 2008||Spohn Michael A||Fluid delivery system including a fluid path set with sterile check valve connector|
|US20080091142 *||6 Dic 2007||17 Abr 2008||Medrad, Inc.||Injector system and fluid control device providing air purging and sharp bolus injection|
|US20090177155 *||18 Mar 2009||9 Jul 2009||Medrad, Inc.||Fluid injection system and pressure jacket assembly with syringe illumination|
|US20090182274 *||23 Mar 2009||16 Jul 2009||Medrad, Inc.||Syringe with alignment flange and expansion section with reduced wall thickness|
|US20090216190 *||7 May 2009||27 Ago 2009||Medrad, Inc.||Syringe having a proximal end with an outward extending lip|
|US20090216192 *||8 May 2009||27 Ago 2009||Medrad, Inc.||Fluid injection apparatus having anti-rotation elements to limit syringe plunger rotation|
|US20090216193 *||8 May 2009||27 Ago 2009||Medrad, Inc.||Fluid injection apparatus having a syringe presence sensor|
|US20090247865 *||2 Jun 2009||1 Oct 2009||Medrad, Inc.||Drip chamber and fluid level sensing mechanism for a fluid delivery system|
|US20100019178 *||7 Oct 2009||28 Ene 2010||Acist Medical Systems, Inc.||Low pressure measurement devices in high pressure environments|
|US20100076307 *||21 Sep 2009||25 Mar 2010||Medrad, Inc.||Flow based pressure isolation mechanism for a fluid delivery system|
|US20100114040 *||5 Nov 2008||6 May 2010||Medrad, Inc.||Fluid mixing control device for a multi-fluid delivery system|
|US20110092828 *||22 Dic 2010||21 Abr 2011||Spohn Michael A||Fluid Delivery System, Fluid Path Set, and Pressure Isolation Mechanism with Hemodynamic Pressure Dampening Correction|
|US20110114197 *||26 Ene 2011||19 May 2011||Acist Medical Systems, Inc.||Low pressure measurement devices in high pressure environments|
|US20130184576 *||26 Jul 2010||18 Jul 2013||Sugan Co., Ltd.||Valve-equipped hand switch and chemical liquid introduction system|
|USRE45717||24 Abr 2014||6 Oct 2015||Bayer Medical Care Inc.||System and method for proportional mixing and continuous delivery of fluids|
|WO2005105196A2 *||5 Abr 2005||10 Nov 2005||Medrad, Inc.||Fluid path set with pressure isolation mechanism|
|WO2005105196A3 *||5 Abr 2005||12 Oct 2006||James Albert Dedig||Fluid path set with pressure isolation mechanism|
|WO2005110007A3 *||12 Abr 2004||7 Dic 2006||Medrad Inc||Fluid delivery systems, pressure isolation mechanisms, injector control mechanisms, and methods of use thereof|
|WO2012014267A1 *||26 Jul 2010||2 Feb 2012||Sugan Co., Ltd.||Valve-equipped hand switch and drug-solution introduction system|
|WO2016053114A2 *||9 Sep 2015||7 Abr 2016||Raymond John Avery||Gravity infusion iv bag|
|WO2016053114A3 *||9 Sep 2015||9 Feb 2017||Raymond John Avery||Gravity infusion iv bag|
|Clasificación de EE.UU.||604/118, 604/151|
|Clasificación internacional||F16K31/383, A61M5/168|
|Clasificación cooperativa||F16K31/383, A61M5/16854|
|Clasificación europea||F16K31/383, A61M5/168D4|